Fig. 2.

Bs inhibits Bm growth in a contact-dependent manner. a Illustration of a single Transwell chamber. The medium is shared between the inner and outer compartments, while the cells cannot pass the 0.4 μm membrane barrier. b Bs (PY79) and Bm (OS2) cells were grown in Transwell chambers containing LB as indicated by the layout. Compartments containing Bs are shown in blue hues, while compartments containing Bm are shown in yellow hues. White circles represent compartments containing LB only. c, d Shown are OD₆₀₀ (c) and CFUs (d) of cells grown in Transwell chambers for 6 h. The numbers and colors correspond to the layout described in b. Each column represents an average value and s.d. of three independent experiments